CFR › Title 50 › Part 29 › §29.6450 CFR §29.64Verified against eCFR.gov as of June 20, 2026View official text on eCFR.gov ↗Copy linkYour pre-existing operations are also subject to the following regulations in this part 29:(a)§ 29.120(b), (d), (f), and (g) and § 29.121(a) and (c)-(f);(b)§ 29.170(a);(c)§§ 29.180 and 29.181;(d)§ 29.190; and(e)§ 29.200.